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United States Patent | 6,168,040 |
Sautner ,   et al. | January 2, 2001 |
A double-wall insulated container has an internal wall and an external wall enclosing an intermediate space which is under partial vacuum. A foam glass granulate fills the intermediate space and supports the walls. The walls may be metal or plastic and sealed with a vapor barrier as necessary to make the space leak-proof. The container may be styled as a Dewar flask for food or beverages, or larger to make it suitable for a household appliance such as a refrigerator.
Inventors: | Sautner; Karl Heinz (Angelbachtal, DE); Kerspe; Jobst (Bammental, DE) |
Assignee: | Isovac GmbH (Sinsheim, DE) |
Appl. No.: | 390123 |
Filed: | September 3, 1999 |
Sep 05, 1998[DE] | 198 40 640 |
Current U.S. Class: | 220/592.1; 220/62.15; 220/592.25; 220/592.26; 220/592.27 |
Intern'l Class: | B65D 023/02 |
Field of Search: | 220/592.1,592.25,592.27,592.26,62.22,62.15 |
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4097422 | Jun., 1978 | Markusch | 260/2. |
4142030 | Feb., 1979 | Dieterich et al. | 521/100. |
4142910 | Mar., 1979 | Kraemer et al. | 106/86. |
4444821 | Apr., 1984 | Young et al. | 220/592. |
4674674 | Jun., 1987 | Patterson et al. | 220/592. |
4729853 | Mar., 1988 | von Bonin | 252/6. |
5678725 | Oct., 1997 | Yamada et al. | 220/426. |
Foreign Patent Documents | |||
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